ML19270G437

LER 79-026/03L-0 on 790507:radwaste Bldg Exhaust Fan 69-FN-8A Did Not Trip Per Hi-Hi Radiation Signal.Caused by Misadjusted Position Switch Associated W/Discharge Damper. Switch Linkage Adjusted

ML19270G437
Person / Time
Site:	FitzPatrick
Issue date:	06/05/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19270G436	List: ML19270G435 ML19270G437
References
LER-79-026-03L, LER-79-26-3L, NUDOCS 7906080235
Download: ML19270G437 (2)

Text

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JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACIDENT TO LER 79-026/03L-0 Page 1 of 1 While in cold shutdown, during the conduct of Operations Surveillance Test FST-1211 titled " Rad Waste Building Exhaust Monitor Logic System Functional Test," the Rad Waste Building exhaust fan (69-FN-8A) did not trip as the result of a hi-hi radiation signal. The testing was being cond acted to satisfy the requirements of Technical Specification Appendix A, s'aragraph 4.2.D and Table 4.2-4.

Since the plant was in a cold shutdown condition the requirements of Technical Specification Appendix B, Paragraph 2.3.B.9 were met and since no activities involving significant quantities of radioactive gases or particulates were being conducted, the event did not represent a significant hazard to the public health and safety.

Investigation revealed that the position switch associated with the discharge damper on 69-FN-8A was misadjusted and thus did not cause an automatic shutdown of the fan when the hi-hi radiation signal was present.

The damper position switch linkage was adjusted and proper operation of both fans and radiation monitors was verified by successful completion of FST- 1211.

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